Introduction Cette étude a pour objectif principal d’analyser les effets d’un programme multi-composant (équilibre, marche, double-tâche) sur les troubles de la marche et le risque de chute de ...patients atteints de démence. L’objectif secondaire est de déterminer s’il existe une relation entre les capacités de marche et le risque de chute chez les patients déments avant et après un programme d’entraînement. Matériel et méthodes Nous avons proposé à 16 patients déments (86,7 ± 5,4 ans) un programme d’exercices multi-composants d’une durée de 8 semaines. La marche, le risque de chute et le niveau d’activité physique sont respectivement évalués par le Locométrix® , le test de Tinetti et le Body Media SenseWear® Pro armband avant et après le programme d’entraînement. Résultats Le programme d’exercices multi-composants améliore les performances de marche et le score au test de Tinetti ( p < 0,05). En effet, après huit semaines d’entraînement, la vitesse de marche est augmentée de 0,12 m/s (0,55 ± 0.17 m/s vs. 0,67 ± 0,14 m/s). Finalement, les performances de marche (vitesse de marche et longueur de l’enjambée) sont corrélées avec le score de Tinetti ( p < 0,05). Discussion–conclusion L’analyse des paramètres spatio-temporels de la marche par un accéléromètre (Locométrix® ) est une méthode simple et rapide pour estimer les bénéfices d’un programme d’exercice et le risque de chute de patients déments.
The technological prototype of the CALICE highly granular silicon–tungsten electromagnetic calorimeter (SiW-ECAL) was tested in a beam at DESY in 2017. The setup comprised seven layers of silicon ...sensors. Each layer comprised four sensors, with each sensor containing an array of 256 5.5×5.5 mm2 silicon PIN diodes. The four sensors covered a total area of 18 × 18 cm and comprised a total of 1024 channels. The readout was split into a trigger line and a charge signal line. Key performance results for signal over noise for the two output lines are presented, together with a study of the uniformity of the detector response. Measurements of the response to electrons for the tungsten loaded version of the detector are also presented.
Cette étude contribue à quantifier l’influence d’un appel d’urgence nocturne sur la régulation autonome du myocarde chez de jeunes sapeurs-pompiers.
Nous avons réalisé et analysé un enregistrement de ...la variabilité de la fréquence cardiaque pendant une nuit d’astreinte chez 11 sapeurs-pompiers. Ce réveil brutal induit une hyperstimulation du système nerveux sympathique avec un retrait du système nerveux parasympathique.
Nous avons montré que le passage de l’état de sommeil à celui d’éveil constitue un facteur de risque cardiovasculaire important chez les pompiers dans l’exercice de leur fonction.
The objective of our work is to study the impact of night emergency calls on autonomic myocardial regulation of the heart of firefighters.
Eleven good health firefighters participated in the study. The registration of the VFC on call overnight allowed us to quantify the impact of a night-time emergency call on autonomic myocardial regulation activity.
We have shown that the brutal transition from sleep to awakening state is a risk for firefighter's health.
L’objectif de notre travail est d’évaluer les bénéfices d’un programme d’entraînement mixte sur la variabilité de la fréquence cardiaque, la composition corporelle et sur la vitalité de la femme âgée ...de plus de 60
ans.
La population d’étude est composée d’un groupe expérimental (
n
=
11) ayant suivi un programme d’entraînement de quatre mois et d’un groupe témoin (
n
=
14). Chaque sujet a bénéficié d’une évaluation anthropométrique, cardiovasculaire (analyse de la variabilité de la fréquence cardiaque) et psychologique.
Cette étude nous permet d’affirmer qu’un programme d’activité physique d’intensité modérée peut induire des bénéfices sur le plan physique, anthropométrique et diminuer le risque de maladies cardiovasculaires.
The aim of our study is to evaluate the benefit of a mixed training program on the heart rate variability, the body composition and on the vitality of the old woman over 60 years.
The study population consists of an experimental group (
n
=
11) who underwent a four-month training program and a control group (
n
=
14). Each subject received an anthropometric, cardiovascular (analysis of heart rate variability) and psychological assessment.
This study allows us to assert that a program of physical activity of moderate intensity has an effect on physical and anthropometric parameters and decreases the risk of cardiovascular disease.
The OBELIX chip for the Belle II VTX upgrade Babeluk, M.; Auguste, D.; Barbero, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
10/2024, Letnik:
1067
Journal Article
Recenzirano
The OBELIX depleted monolithic active CMOS pixel sensor (DMAPS) is currently developed for the upgrade of the vertex detector of the Belle II experiment located at Tsukuba/Japan. The pixel matrix of ...OBELIX is inherited from the TJ-Monopix2 chip, but the periphery includes additional features to improve performance and allow the integration into a larger detector system. The new features include a trigger unit to process trigger signals, a precision timing module and a possibility to transmit low granularity hit information with low latency to contribute to the Belle II trigger. Additionally, low dropout voltage regulators and an ADC to monitor power consumption and substrate temperature is developed. This paper will focus on the trigger contribution capabilities of the OBELIX chip.
Abstract The purpose of this retrospective study was to gain insight into the contribution of the dorsolateral pons to the coordination of swallowing and breathing in awake goats. In 4 goats, ...cannulas were chronically implanted bilaterally through the lateral (LPBN) and medial (MPBN) parabrachial nuclei just dorsal to the Kölliker–Fuse nucleus (KFN). After >2 weeks recovery from this surgery, the goats were studied for 5½ h on a control day, and on separate days after receiving 1 and 10 μl injections of ibotenic acid (IA) separated by 1 week. The frequency of swallows did not change during the control and 1 μl IA studies, but after injection of 10 μl IA, there was a transient 65% increase in frequency of swallows ( P < 0.05). Under control conditions swallows occurred throughout the respiratory cycle, where late-E swallows accounted for 67.6% of swallows. The distribution of swallow occurrence throughout the respiratory cycle was unaffected by IA injections. Consistent with the concept that swallowing is dominant over breathing, we found that swallows increased inspiratory ( TI ) and expiratory ( TE ) time and decreased tidal volume ( VT ) of the breath of the swallow ( n ) and/or the subsequent ( n + 1) breath. Injections of 10 μl IA attenuated the normal increases in TI and TE and further attenuated VT of the n breath. Additionally, E and I swallows reset respiratory rhythm, but injection of 1 or 10 μl IA progressively attenuated this resetting, suggesting a decreased dominance over respiratory motor output with increasing IA injections. Post mortem histological analysis revealed about 50% fewer ( P < 0.05) neurons remained in the KFN, LPBN, and MPBN in lesioned compared to control goats. We conclude that dorsolateral pontine nuclei have a modulatory role in a hypothesized holarchical neural network regulating swallowing and breathing particularly contributing to the normal dominance of swallowing over breathing in both rhythm and motor pattern generation.
Abstract The Belle II collaboration has initiated a program to upgrade its detector in order to address the challenges set by the increase of the SuperKEKB collider luminosity, targeting 6×10 35 cm 2 ...s -1 . A monolithic CMOS pixel sensor named OBELIX (Optimized BELle II pIXel) is proposed to equip 5 detection layers upgrading the current vertex detector. Based on the existing TJ-Monopix2, OBELIX is currently designed in 180 nm CMOS process.
Additive Manufacturing (AM) enables 3D metallic objects to be built by adding layer- upon-layer of material. This technology can be applied to produce Ultra High Vacuum components for particle ...accelerators. We investigated in this work the reproducibility of AM 316L stainless steel properties for different specimens supplied by several manufacturers with the same process. Microstructure and mechanical properties of AM samples depends on manufacturers: indeed, they are largely influenced by processing parameters, which produces heterogeneous and anisotropic microstructures that differ from traditional wrought counterparts. The outgassing rates of vacuum AM 316L tubes were determined and the secondary electron yield was also measured. Results are very promising to consider the use of AM to construct accelerator beam pipe components.
A highly granular electromagnetic calorimeter with scintillator strip readout is being developed for future linear collider experiments. A prototype of 21.5 X0 depth and 180×180mm2 transverse ...dimensions was constructed, consisting of 2160 individually read out 10×45×3mm3 scintillator strips. This prototype was tested using electrons of 2–32 GeV at the Fermilab Test Beam Facility in 2009. Deviations from linear energy response were less than 1.1%, and the intrinsic energy resolution was determined to be (12.5±0.1(stat.)±0.4(syst.))%∕EGeV⊕(1.2±0.1(stat.)−0.7+0.6(syst.))%, where the uncertainties correspond to statistical and systematic sources, respectively.
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